WITH A MULTITUDE OF WARFIGHTERS in what seems to be a never-ending array of locations, making sure they stay in contact has become more difficult than ever. Often, this situation is further challenged by rough terrain, which blocks line-of-sight ...

The use of DGS units and stepped microstrip lines with standard low-loss microwave substrates can lead to miniature lowpass filters with extremely wide stopband ranges and excellent return-loss performance.

An increasing number of services and applications are relying on space-based technology. Examples include navigation, satellite broadcasting, and even medical research. Yet such services could be easily interrupted by collisions with space debris...